查询词典 collar box

Stress-relief structure not in accordance with related standard and the stress situation would lead the thread root to be the weakest position of drill collar box.

结果表明，钻铤材料中MnS夹杂物超标，螺纹底部和牙侧存在腐蚀坑和加工划痕，这些缺陷的存在降低了钻铤的服役能力。

Results showed that the MnS inclusion wasn't in accordance with standard, and there were lots of corrosion pits and mechanical defects at root and flank, which would damage the drill collar box.

摘 要：通过宏观分析、力学性能测试、化学成分分析、金相组织和微观断口分析，对某井发生的钻铤内螺纹接头横向开裂失效原因进行分析。

"Rag!" said the box-iron; and went proudly over the collar: for she fancied she was a steam-engine, that would go on the railroad and draw the waggons.

熨斗说，同时很骄傲地在衬衫领子上走过去，因为她想象自己是一架火车头，拖着一长串列车，在铁轨上驰过去"你这个老破烂！"

Said the box-iron; and went proudly over the collar: for she fancied she was a steam-engine, that would go on the railroad and draw the waggons."Rag!" said the box-iron.

熨斗说，同时很骄傲地在衬衫领子上走过去，因为她想象自己是一架火车头，拖着一长串列车，在铁轨上驰过去"你这个老破烂！"

Study is aimed at box threads of Φ177.8mm drill collar to analyze and calculate drill collar box thread with different stress-relief grooves using finite element method, the stress concentration of thread end of 3 types of box threads is gained under same boundary condition and load.

以177.8mm钻铤母螺纹接头作为研究对象，用有限元方法对加工有不同应力减轻槽的钻铤母螺纹接头进行了分析计算，得出了3种不同母螺纹结构在相同边界条件和载荷作用下螺纹消失端的应力集中情况。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。